Filter



May 17, 1927'.

s. L. SMITH FILTER Filed Sept. 22. 1926 mvsnrron Patented May 17, 1927.

UNITED STATES PATENT OFFICE.

SIDNEY L. SMITH, OF PITTSBURGH, PENNSYLVANIA.

FILTER.

Application led September 22, 1926. Serial No. 137,089.

This invention relates t a filter, the general object of the inventonbeing to provide a filter, the filtering medium of which can be easilyremoved for the purpose of recharging, repairing and the like, withsimple means for attaching the screens at the ends of the medium to thecylinder which carries the medium.

A further object of the invention is to provide means for causing thewater to passv in a reverse direction through the device for cleaningthe same.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claim.

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the lseveral views, and in which Figure lis a longitudinal sectional view through the device. Y

Figure 2 is a view of one* of the caps.

Figure 3 is a top plan view of the screening medium.

Figure 4 is a fragmentary perspective view showing the manner ofclamping a screen in place.

In these views,`1 indicates the casing or body of the device, which isof cylindrical form and has its ends screw threaded to receiveV the endcaps 2. Each cap is provided with a pair of lugs 3 so that a bar or thelike can be placed between the lugs in order to screw the cap'firmly onthe cylinder to make a tight joint. Each cap is provided with a gasket4. An annular internal rib or bead 5 is formed in the cylinder 1adjacent its lower end which forms a rest for the filtering medium. Thismedium comprises a cylinder 6 which has its ends enlarged, as at 7, eachend having a groove 8 therein for receiving a packing ring 9 whichengages the interior wall of the cylinder 1 to make a water-tight jointbetween two cylinders. Each enlargement 7 is provided with a groove 10in its upper face for receiving an annular bead 11 formed on a ring 12which is fastened to each enlargement 7 by the screws 13. A screen 14 isplaced at each end of the cylinder 6 and is held in place by beingclamped between each enlargement 7 and each ring 12, the groove and beadengaging the edge of the screen and thus firmly holding it in place. Thefiltering material is shown at l5 and may be of any suitable type, suchas sand and gravel or the like. The top ring 12 is provided with handles16 so that the filtering medium can be easily removed from the outercylinder.

The supply pipe 17 is connected with the lower end of the casing 1 bythe branch 18 which has a valve 19 therein. An upright pipe 2O isconnected with the supply pipe and this pipe 20 is connected with thetop of the filter by the branch 21 and a valve 22 is placed in the pipe2O above the branch 21. This pipe 20 also has a valve 22 in its lowerend. A drain pipe 23 is attached to the bottom cap of the filter and hasa valve 24 therein. The filter is adapted to rest on the supportingframe 25.

From the foregoing, it will be seen that by closing the valves 22 and 24vand opening the valves 19 and 22, water will pass into the bottom ofthe filter and then pass upwardly through the filtering medium to thetop of the filter and will pass therefrom through the pipe 2l and bedelivered to the point of use through the top` part of the pipe 20. Asthe water passes through the filtering medium, it will be freed of allimpurities, as will be understood. When the filter is to be cleaned, thevalves 19 and 22 are closed and the valves 22 'and 24 opened. Then thewater will pass upwardly through ythepipe 20, through the branch 21 intothe top of the filter and then pass downwardly through the filteringmedium and discharge through the pipe 23. Thus the filter will beflushed and cleaned by the water moving in a reverse direction from whatit does when the filter is in operation. When the filtering material isto be renewed, the top cap is removed and the filtering medium pulledfrom the outer casing or cylinder by means of the handle 16. Then. thescreens are removed and the filtering material dumped out and'newmaterial put in place. The screens are then replaced and the device put105 back in the outer casing.

It is thought from the foregoing description that `the advantages andnovel features of my invention will be readily apparent.

n I desire it to be understood that I may make changes in theconstruction and in the combination and arrangement of the severalparts, provided that such changes fall Within the scope of the appendedclaim. V

What I claim is:-

A ilter of the class described Comprising a casing, a screw ea-p closingeach end thereof, a filtering medium in the casing comprising :Lcylinder containing iiltering material, gaskets between the cylinder andthe easing, a screen at each end of the Cylinder, a ring fastened toeach end of the cylinder for holding the screen in place, each ring`having a rib and each end of the cylinder having;` aV groove forreceiving the rib and the edge of the Screen and a handle on the topring.

In testimony whereof' I allix my signature.

SIDNEY L. SMITH.

